Research Faraday wrote:

> 
> I read the ICL7107 datasheet and I came to know that the ADC reacts to the
> reverse current from the LEDs and grounding the digital and the analog
> signals is necessary. I am going to try grounding the display's ground and
> my sensors ground to the body of the enclosure.
>

I don't know if you mentioned where the power for the ICL7107 was coming
from.

The power supply of the ICL7107 must be totally isolated and floating
from that used by the input signal, or else you need to add a
differential amplifier to the input of the ICL7107.

The ICL7107 is intended for a handheld multimeter with its own 9V
battery, so they did not make it easy to share grounds.

Cheerful regards,

Bob
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